Ten people died in a 2010 raid by Israeli commandos on the Mavi Marmara, the lead ship in an aid convoy attempting to breach Israel's blockade of Gaza. The ICC said it won't prosecute Israel, despite 'reasonable' evidence of war crimes.

The International Criminal Court announced Thursday that it would not prosecute Israel for its deadly raid on a Gaza-bound flotilla in 2010, despite evidence that Israeli forces may have committed war crimes.

On May 31, 2010, eight Turks and one Turkish-American were killed when Israeli commandos stormed the Mavi Marmara, the lead ship in a six-vessel aid convoy that was attempting to breach Israel's blockade of Gaza. A 10th activist later died of his wounds and several more were injured.

"I have concluded that the potential case(s) likely arising from an investigation into this incident would not be of 'sufficient gravity' to justify further action by the ICC," Ms. Bensouda said. She added that she did not want to minimize "the impact of the alleged crimes on the victims and their families."

Bensouda opened a preliminary investigation into the raid last year after Comoros – a small African country that is a member of the ICC – referred the incident to the court. The Mavi Marmara was flying under a Comoros flag.

"This is a moral struggle that we're pursuing by ourselves. It's a legal struggle, a struggle in the name of humanity. This struggle isn't over," attorney Ramazan Ariturk told reporters in Istanbul. "We will object to a higher court at the International Criminal Court and we believe without a doubt that we will prevail."

Israel's foreign ministry called the case "legally unfounded and politically motivated" in a written statement. It welcomed the decision to close the case.

A previous Israeli investigation concluded that the raid and blockade were legal under international law, the BBC reports. While a United Nations panel in 2011 agreed that the blockade was legal, it said the use of force by Israeli commandos was "excessive and unreasonable."